3. Rename JunModel.u to OldJunModel.u
4. Rename HallsOfValhalla.u to OldHallsOfValhalla.u
5. Start the server with the following command:

rune.exe DM-Hildir?Listen -VERS=101 -server

That is all! Now you can host a dedicated 1.01 server from you Rune Classic game and people who have normal Rune will be able to join your server! You do not even have to be connected to Steam when you start the server this way.

To run a Rune 1.07 server you would just change -VERS=101 to -VERS=107.